The level of brutality is something I don't think that even I was prepared for.

Did this really happen? Did I do this? Or was this a fever dream?

I can only imagine the horror that she experienced in those moments.

This is The Idaho Massacre, a production of KT Studios and IHeart Radio.

Season 3, Episode 3, The Unsealed Files.

I'm Courtney Armstrong, a producer at KT Studios with Stephanie Leidiger and Gabriel Castillo.

For nearly three years, much of the case against Brian Koberger has remained sealed,

hidden behind redactions, legal arguments, and courtroom silence. But now, that silence is breaking.

Shortly after the convicted killer was led off to begin his life sentence,

hundreds of pages of investigative documents were unsealed.

Giving us our most detailed look yet into the case that stunned the country.

The evidence, the interviews, and more information on the chilling timeline of what unfolded

in the hours, days, and weeks surrounding the murders of Madison Mogan, Kaylee Gonzalez,

Zana Kernodal, and Ethan Chapin.

What do these newly revealed documents tell us? How do they change our perception of what went on

that fateful night? And what questions do they raise about motive, surveillance, and intent?

Today we're diving into what investigators walked into on that fateful day

and what it can mean in terms of a possible target in this case.

Here's forensic expert Joseph Scott Morgan with our producer, Alison Bankston.

When you were going through these documents, what stood out the most to you and what surprised you the most? What jumped out at you, forensically?

Level of brutality. For me, because it sounds horribly naive, but for me, I think I'd always hoped that it wasn't going to be as bad as it

has turned out to be. I should have known better as an old death investigator and a forensic

...